Chapter 57. Sub-Critical Crack Growth Parameters for Low Temperature Co-Fired Ceramic (LTCC)

  1. Rajan Tandon,
  2. Andrew Wereszczak and
  3. Edgar Lara-Curzio
  1. Rajan Tandon,
  2. Clay S. Newton,
  3. Saundra L. Monroe and
  4. S. Jill Glass

Published Online: 27 MAR 2008

DOI: 10.1002/9780470291313.ch57

Mechanical Properties and Performance of Engineering Ceramics II: Ceramic Engineering and Science Proceedings, Volume 27, Issue 2

Mechanical Properties and Performance of Engineering Ceramics II: Ceramic Engineering and Science Proceedings, Volume 27, Issue 2

How to Cite

Tandon, R., Newton, C. S., Monroe, S. L. and Glass, S. J. (2006) Sub-Critical Crack Growth Parameters for Low Temperature Co-Fired Ceramic (LTCC), in Mechanical Properties and Performance of Engineering Ceramics II: Ceramic Engineering and Science Proceedings, Volume 27, Issue 2 (eds R. Tandon, A. Wereszczak and E. Lara-Curzio), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291313.ch57

Author Information

  1. Materials Reliability Department, Sandia National Laboratories MS 0889, P. O. Box 5800 Albuquerque, NM 87185, USA

Publication History

  1. Published Online: 27 MAR 2008
  2. Published Print: 1 JAN 2006

ISBN Information

Print ISBN: 9780470080528

Online ISBN: 9780470291313

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Keywords:

  • biaxial-flexure;
  • magnitude;
  • microanalyzer;
  • linear-regression;
  • ltcc

Summary

Strength values of a sintered low temperature co–fired ceramic (LTCC) tape system were measured over four orders of magnitude of stressing rate in dry (<2% relative humidity (RH)) and in wet (98% RH) conditions using a ring–on–ring biaxial–flexure test. As expected, the strength of the material increases with increasing stressing rate, and with decreasing RH. These data are analyzed to obtain the empirical sub–critical crack growth (SCG) exponent, n. It was found that the n value in high RH environment was higher than that in the low RH environment. Fractographic examination was used to identify failure origins, which ranged from surface and sub–surface pores, partially densified surface regions, inclusions, surface damage and unidentified surface defects. The implications of our results for design with this novel material system are outlined.